Carburetor



G. F. RITTER Oct. 20, 1925- CARBURETOR Filed July 22 m M MW M m N T r 0/ v .w

Patented Oct. 20, 1925.

UNITED "STATES "PATENT OFFICE.

- GEORGE 1'. 31mm, or TOLEDO, onto, Assren'on 'ro TILLOTSON MANUFACTURING company, or romzno, care, A conronA'rIoN or 01110.

cannunnron."

Application fi1 ed J'u1y'22,;1820. Serial no. 898,283. I

To all whom it may concern.

Be it known that I, Gnonon F. RI'r'rER;

residing at Toledo, county of Lucas, State of Ohio,, have invented certain new and useful Improvements in Carburetors, of which I declare the followingto be a full, clear, and exact description: The present invention relates to carburetors of the type shown in my co-pending a plication, Serial No.- 382,008, filed Mayll 1920. The invention has for its object to provide improved means for automatically cutting off the supply offuel'to thecarburetor bowl when the fuel therein reaches a pre determined level.

Another object of the invention is to provide a carburetor bowl having a cover, upon which the entire mechanism '-for controlling the fuel supply is mounted so that the cover and mechanism thereon may be removed as a unit.

Another object of the invention is to construct. the mechanism' mounted within the bowl for controlling the supply of fuel thereto in a manner to permit of a considerable reduction in thesize of the bowl.

Another object of the invention is toprovide an extremely simple fuel controlling mechanism for a carburetor of comparahigely few parts, constructed in such a man er as to require a minimum amount of machine work and capable of being qulckly assembledwithout adjustments whereby the cost of claims.

Likereferenee characters throughout the several views of the drawings indicate corresponding parts. I

In carrying out my invention one embodiment thereof is illustrated ,in the 'accompanyingdrawings in which:

Figure I 1s a plan view of a carburetor embodying the invention.

Figure II is a sectional elevation taken on line IIII of Figure I. I

Figure III is a perspective view ofth'e' vallve controlling levers shownin Figure II an Figure IVis a'fragmentary sectional elevation embodying a. slightly modified form of valve controlling mechanism.

Referring to the numbered parts of the drawing, I have shownmy invention'in connect on with. a carbureting device con: sistihg of an intakepassage 20 communicatmg with a mixing chamber 14 through a series of openin s in a partition 12. In this partition is fitted a Venturi 18 with the main jet or nozzle 21 discharging at a point slightly above the throat of the Venturi.

' Thereare a seriesof auxiliary ai'r openings in the partition 12 which are closed by automatically operating valves. An auxiliary jet or nozzle 30 is shown as located in one of said auxiliary air openings and the carbureting device is also shown as provided with an idle jet arranged adjacent the throttle valve 17. Fuel for the main nozzle, the auxiliary and the idle jet are supplied from a constant level float chamber, and my invention relates to the means provided for maintaining a constant level in said chamber. My invention is not {restricted to use with a carbureting device of the specific construction shown, but may be used with any form of carburetor employing a constant level supply chamber. The conhave just described in general terms, is

described and claimed in my copending apstruction of the car-bursting device which I and connected with the body by any suit- I ablemeans. The head or cover 31 of the bowl is provided with a fuel receiving chamber 32 into which fuel isdischarged through the connection 33. Extending upwardly through the lower wall of the cover and through the fuel chamber 32 is a ost 34 which is threaded at its upper end into a removable cap 35 which in turn is threadedinto the cover, whereby the post is clamped upon the cover. The post, at. the point where it passes through the fuel chamber 32 is provided with a strainer 36 surrounding an annular recess 37 formed the post to permit the post to be withdrawn from the cover without first requiring the removal of the strainer. Positioned within the longitudinal opening 39 of the post .is the fuel valve 40 which is adapted to close said opening when the fuel rises to a predetermined level within the bowl. Extending downwardly from the coveris a lug or projection 41 upon which is pivoted at 42 a. lever 43 resting at its inner end u on a float 44 preferably disposed centrally within the bowl in sliding engagement with a post 45 carried by the removable drain lug 46 screwed into the bottom of the bowl as shown in Figure II. The lever is provided with an upturned portion 47 adapted to en age a stop 48 on the lug 41 to limit the ownward movement. f the lever. Extendingv downwardly fro the vcover is a lug 49 upon which is pivoted at 50 a lever 51 adapted to extend under the valve 40 to loosely engage the same, said lever having its free end bent downwardly as indicated at 53 to'engage the lever 43 intermediate its ends as indicated in Figure II. The levers 43 and 51 are provided with outwardly struck tongues or projections 54 which are adapted to receive the pivot pins 42 and 50 respectively upon which. said levers are mounted, the ends of the pins being anchored upon their respective lugs in any suitable manner. The head or cover 3l is provided with an aperture therethrough as indicated at 55 whereby the fuel in the bowl is at all times subjected to atmospheric pressure. The compound system of levers shown in Figure II is controlled by the float 44 and these parts form a very satisfactory means for actuating the fuel inlet valve 40 to move it into closed position when the fuel in the bowl rises to 'a predetermined level. By mounting the float to move vertically upon the post 45 instead of pivotin it within the bowl the diameter of the latter may be reduced to the minimum to efiect a considerable saving in the amount of metal required to construct this member.

In Fi ure IV I-have shown a modification whreh difiers from that shown in Figure II only in that the inner endsof the upper and lower levers 56 and 57 respectively are slightl chan ed, the latter being connected direct y to t e float 58 whereby the float is pivoted within the bowl instead of being mounted to move upon a vertically fispose guide post as indicated in Figure It will be apparent to those skilled in the art that the invention shown and described herein is susceptible of various modifications, embodiments and arrangements to suit special or varying conditions and I wish it to be understood that the terms which I have used are merely descriptive and not limiting and that it is my intention to include any and all modifications with its free end engaging the first mentioned lever and a valve adapted to be actuated by said second mentioned lever to close said inlet passageway when the fuel reaches a predetermined level within the receptacle.

2. In a carburetor, the combination of a carbureting device, a receptacle, for supplying fuel thereto provided with a fuel inlet opening, a valve for closing said opening when the fuel reaches a predetermined level within the receptacle, a float guided vertically within the receptacle, a pivoted member operatively associated with said float and a second pivoted member loosely engaging said valve and adapted to be actuated by the first mentioned pivoted member to effect the closing of the valve.

3. In a carburetor, the combination of a carbureting device, a receptacle for supplying fuel thereto provided with a fuel inlet opening, a valve for closing said openin when the fuel reaches a predetermined leve within the receptacle, a float mounted in said receptacle, :1 pivoted member operatively associated with said float and a second pivoted member loosely engaging said valve and adapted to be actuated by the first mentioned ivoted member to erfectthe closing of t e valve when the fuel reaches a predetermined level within said receptacle.

4. In a carburetor, the combination of a carburetin device, a receptacle for supplying fuel t ereto provided with a fuel inlet opening, a valve for controlling said openopening, a valve for controlling said openmg, upper and lower pivotal members, the free end of one of which is ada ted to rest upon the other, said members eing operatively associated with said valve, and a float adapted to move said members "upon their pivots.

6. Ina Carburetor, the combination of a carbureting device,'a receptacle adapted to supply fuel thereto provided with a fuel inlet opening, a valve for controlling said opening, a compound system of disconnected levers operativel associated with said valve, a float slidab y mounted'in said receptacle and adapted to actuate said. levers and means forv limiting the movement of the levers in a direction away from the valve seat. I

7. In a carburetor, the combination of ,a carbureting device, a receptacle adapted to supply fuel thereto provided with a fuel inlet opening, a valve for controlling said opening, a compound system of disconnected levers operatively associated with said valve, a float mounted in said receptacle and adapted to actuate said levers and a stop in the path of one of said levers for limiting the movement of the same when moving in a direction away from the valve seat.

. 8. In a carburetor, the combination of a carbureting device, a receptacle adapted to supply 'fuel thereto provided withfa fuel in et opening, a valve for controlling said opening, a pivoted member having an upturned portion thereon, a stop in the path of said upturned portion for limiting thevmovement of said pivoted member, a second pivoted member interposed between said valve" and the first mentioned pivoted member and a float adapted to pivoted member.

within the bowl for actuating actuate the first mentioned are.

9.-In a device oft-he class described, thecombmationof a carburetor bowl, a removable cover upon the bowl having an inlet passageway therethrough, a valve for con-" trolling said passageway, a, lever pivoted upon s'ai cover, a second lever pivoted upon the cover adapted to support said valve and having its free end engaging the first men-' tioned lever intermediate ts ends and a float said second mentioned lever. v

10. In a device of the class described,-the

combination of a carburetor bowl, a removable cover upon the bowl having a fuel re-- 'ceivingfchamber therein, a post projecting 'into said'cham'ber and having a recess there.-

in hcommunicating with saidchamber and bowl, means forsecuring said post within the chamber, a valve positioned within the recess formed within said post, a fioatwithin said bowl and a levef operatively asso ciated with said valve andadapted to be actuated bysaid float to move the valve in position to, close said recess when. the 1fuel1 in the bowl. reachesa predetermined eve 11 In a carburetor,-the combination of a fuel receptacle, a cover therefor having an inlet opening and a valve controlling the 7 same, a lever pivoted to said cover and supporting said valve at a point intermedite its ends, a second lever pivoted to said cover and directly engaging thefree end of said first lever, a float supporting the free end of said second lever, and a stop on said, cover for engaging a portion of said second lever to lim tlthe downward niovement of said' levers and said valve.

In testimony whereof, I aflix my signa- GEORGE F. RITTER' 

